Arc-lamp.



R. FLEMING & C. A. BLHALVORSNrJR.

ARC LAMP.

APPLICATION FILED JAN. 16", 1906.

Patented Ju1y13,1909. y

2 SHEETS--SHHET l.

Inventors; Richard Fleming, Cromwell A B. Halvorson Jr f. Richard FleminCromwell A B. l-lalvoon Jr., M bg R. FLEMING (Y: A. B. HALVRSON. JR. ARGLAMP.

APPLIUATION FILED 11.16, 190e.

928,189. Patented Ju1y13,19n9.

2 SHEETS-SHEET 2.

Wtnes ses: Inventors:

UNITED sra-raras Prnnr ormon.

RICHARD FLEMING AND onoMwnLL A. B. IIALvoRsoN, or LYNN, nnssxcnusr'rrs,

' AssIoNons To VGENERAL ELECTRIC COMPANY, `A conroItArIoN-or New YORK.

ARc-LAMP.

Nojeasnse.

Specification of Letters Patent. v Application led January 16,1906.Serial No. 296,303.

Patentes July 13,1909.

To ad whom 'it may conce/m: l

Beit known that we, RICHARD FLEMING and CROMWELLA. B. HALVoRsoN,Jr.,citi Zeus of the United States, residing at Lynn, county of Essex,State ot'. Massachusetts, have invented certain new and 'usefulImprovements intArc-Lamps,v of which the following isa specification. y

Our present invention relates to arc lamps and comprises certainimprovements in t e electrode feedingniechanism of such lamps. Theseimprovements are intended to producean arc .of constant.` length and infixed relation to the arc lamp structure at each feedlng operation inthevparticular embodiment of our Invention disclosed.

Uur invention'also comprises features of construction and arrangement4particularly fumeswhich requirelspecial 'provision for their disposal.f

The various features ofv novelty which characterize our invention arepointed out i with particular-ity in the claims -annexed to andforming,ra part ofxthis specification.

For a betterunderstandlng of our Invention: and for the advantagespossessed by 1t reference may be had to the accoI'npanyingv drawings andd'escri tive matter lin which we lhave ustrated an described some of theforms In which vour Invention maybe /em- 1 bodied. f

Of the drawings, Figure 1 is a perspective View of an arc lamp withcasmganr globe broken away and in 'sectiong'Fig 2'is a sectionalelevation illustrating the lamp ventilation and the arrangementl of theupper electrodepFig. 3 is an inverted )lan showing the lower end of thelower electrode and nozzle surrounding mechanism; Fig. 4 is aperspective view-of a portion of an arc lamp' illustrating a. modifiedYelectrode feeding mechanism; and Fig. 5 is 'a perspective view`illustrating-'the clutch mechamsmused in the lampfshown in Fig.' 1.

In the construction disclosed in Figs. 1V andv 2 an arc lamp is shown inwhichV the back-y bone of.. the arc lam `frame-work is formed by "adraft tube or c imneymember 1. To

the member 1 at a short distance-below its upper Iend is secured a hood2. To the ex- .treme upper endof thechimneyxmember 1 or an extensionthereof, is secured a carrier member 3 froin'the upper side ol' whichmay extend members 4 through which the lamp is suspended.- lnxtheconstruction shown, the lower end of the chimney member 1 is in threadedeno'agement vwith a hell-shaped fume box or lhood memberl 5; The member5 is provided with an annular flange portion 6 which forms the lowerplatform of the -arc lamp. From the conical portion of the member 5belowthe platform 6 extend two boxlike chambered portions or pockets 7'Vopen at their .upper ends diametrically opposed to each other withrespect to the axis :of the member 5.

Openings are formed in the' adjacent inner Awalls of the member 7A intowhich project the- As shown, thev ends of a hollow member 8. member 8 isseparated from the o'rton 7 by insulation and is hold in placey means ofplates 9 secured to the lower ends ot' the portion 'Ybysc'revvs` 10."lThe member S is .formed with a tubulabo's's 11 projecting from its upperside and coaxial with the The lower end of n.' tube-like member 12 isseclred in the boss `1.1 The lower end of the upper electrode 13 of.v

chimney member 1.

the lamp projects from the lower end of the member 12 which serves as ashield or recep-l is connected a horizonta portion or `diavphragm 20, 1ssuitably secured mtho boss 1S.

A central aperture 21 is formedv in the portion 20 through whichthelower end of the electrode 13 projects. vA series of apertures 22 arealso formed inthe portion 20 surround-v ing the aperture 21. Tithin thecaplilge member and preferably separated from itby insulation 23 issecured an annular member 24; which islprovid'ed with an inwardlyextending proj ection-25 forming'- a sto for li1niting the upwardmovement of tie lower electrode in a manner hereinafter described,

A' flexib le conductor and t rough an insulating guide 31 secured forthe pur ose in an opening in the plat- 'form 6.

is connected` the electrode is gripped between the projections 27. When,

an Vupward pullxis exerted uponv the member e lever 26 is tilted so thatthe upper electrode-'is released and is free to move downward under theaction of gravity. Nut

32 threaded on the rod 30 engages the und er side of the guide 31 tolimit the upward 1 movement of the member 30.

The lower electrode 33 which in the worl-V ing. osition ofthe lamp shownin Fig. 2 is in alinement'wit-hthe electrode 13, is supaxia ported in asocket formed in a bracket'arm 34 carried at the lower end of a hollowbarlike member 35 which is rectangular in crosssectional outline. Themember 35 slides through a tubular member 36 secured to theplatform 6extending down through an open- -ing formed forthe purpose in thelconical I portionof the member 5, and slidesupon a member 37 secured tothe framework of the Y lamp in any suitable manner. The member `tweenthe 35 1s engaged by two clutches located belatform 6 and the hood 2.The lower clutcli in the formv shown in Figs. land 5 of the drawingscomprises a bar-like member 3'8 provided with an aperture 39 at one endthroughwhich the member 35 extends.

j opening 39 to lock 'the members 35 and 38V The member 38 is so'arranged that when its` fend opposite to that containing the a erture 39is raised,' the member 35 is crampe in the together. The end of themember 38 remote from the member 35 is pivoted to the lower end, of alink-like member 40. The upper end of the member 40 is pivotallyconnected toa link-like member 41 to the other end of which is pivotallyconnected a member 42 provided with an aperture '43 through `which themember 35 passes. 4The member 41 is formed with an aperture'between itsends and adjacent the member 42 through which loosely passes a rod'44.-The rod 44 has secured to 1t a'fulcrum member 45 which 0- engages theunderside of the member 41. 6

When the. rod 44 is pulled upward and the adjacent end of the member 42correspondingly raised the member 35 is cramped 1n the opening 43, thuslocking the members 35 and 42 together.

The member44 is extended to pass through en' the member 30 does not holdup the end of the member 26 to which it owever,

member 38.. Adjustably secured to the member 45 by means of screws 47 isa hook shaped member 48. The hook portion of the member 48 extendsthrough a slot 49 ina clined portion. The member 38 is provided withanaperture through which t e'upper end of the clutch operating'member'30 extends. A pair of nuts 51 secured t0 the upperend of the'member 30 serve as a'means by whichthe amount of upward movement of themember 38 necessary to cause the member 30 to be elevated to, releasethe upper electrode can be adjusted- The-upper endofthe rod-'like member44 is pivotally connected tota member 52 connected to the undersideofthe U-shaped armature53 by springs 53. The legs-,oli the armature 53extend into solenoidI coils 54. The movable shell memberv55 of adash-pot is secured to l the member 52j.' lThe. stationary pistonr Imember 56 of the dash-pot is secured to an extension ofthe member 50. l

When the lamp is inl the lout-of-service position the electrodes are inthe osition Vshown in Fig. '-2, the lower electro e lbeing supported bythe member 38 which inrturn is oft e lamp the upper electrode is grippedbetween the pins 27. As soon as the lam is connected into the operatingcircuit armature 53 to be'attracterhthus elevating the member 44. Theinitialupward movement of themember 44 causes-both clutch members -38and 42 to grip the member 35, after'which the member- 35 and the lentireclutch mechanism moves upwardwithv the member 44 until the upwardmovement of A fterthe upward movement of thepmem'ber 38 is checked bythe member30 through the nuts 32 and 51 further upward movement of themember .44 causes the member 42 -totilt about' the fulcrum block 45causing a further upward movement of the member 35 which is then movedthrough the aperture 39. As

tion of the member 48 moves out ofthe lower the vertical portion of theslot. This moveber 45 and-thereby of .the lower end-'of the anism turnsthe member 35 about the rod- 37 as an axis.- This results. invthrou'ulng the lower electrode from a osition in'alinement --with theupper electro e to the position indicatedby the dotted line in Fig. 3.The u ward movement of the member 35 is c ecked by the engagement oftheupper end of the electrode 38 with the projection 25.

slotted member 50 secured -to the chimney. member l. As shownfthe slot49 comprises an upper vertical'portion and a lower msupported by theplatel 50. In this condition' the coils 54 are energized. This' causesthe ment Vcauses a lateral movement of the mem-` an opening formed forthe purpose iny the l the member 38 is checked by the member 30.

the member 45 moves upwardthehook porend of the inclined portion oftheslot 49 into member 44 which through the clutch mech- The position ofthe clutch mechanism at this i instant is shown in Figs. I an`df5. i Ator usually slightly before the instant at. which the electrode 33engages the projection 25 the member 30 is raised by the member. 38sufficiently to release the upper electrode.which drops into engagementwithone'side of the upper end of the lower electrode. As soonv ascurrent begins to fiow through the electrodes, the coils 54 .areautomatically deenergized in any suitable' manner -and the member 35andfelectrode 33 begin to descend under the action of gravity. Thedash-pot members 55 and 56 are arranged'to cop'erate to retard "thedownward movement of the electrode .33 4without im edin the upwardmovement of the electro e, r[gh movement of the member A435, is checkedby the engagement of the lower clutch member 3,8 with themember 50. Asthe member 45 descends the coperating cams formed by the member 48 andthe walls ofthe slotl 49 causes the electrode 33 to fbe swung back Mintoaxial Valinement with thefelectrodel] .The clutch mechanism .is soarranged that when the coils 54 are denergiz'ed and the lamp is in itsnormal running or .operative condition, as well asin its outof-'servicecon dtionflthe' projection' 42v yof the member 42 rests on' the member38. f f

It will be understood that the movement of the member 35 through theclutch member 38 at each feeding operation is greatl cess in plate50,and the stop for the upward movement is constituted by the nuts 32and '51 on'rod 30. soon as the member 38 starts to descend the member 30is released, whereupon the electrde 13 is again grip ed -between theprojections 27 t themem` er 2 6, As a result after each feeding opera-Vtion the lower end yof the upper electrode,

` projects through the diaphragm 19 a--fixed distance as shown in Fig. 2by dotted lines.

The 1am mechanism between the hood 2 and plat orm 6 is inclosed by acasing 57 which may be" of any suitable lconstruction.

,An annular rmember 58 is secured "to fthe lower end of the member 5 ofwhich'it forms' an extension. The member 58-in turn supports in anysuitable manner' a transparent or translucent. globe 59.

Inoper-ation, the heat of the arc causes a rapid ow of airjup throughthe chimney 1.

The air carried out of the chimney 1 in this manner is replaced by airentering through the members 7 and 8. The air entering in e downwardVthis manner passes down through the nozzle formed by the apertures 22 to.form atubular body of air surrounding the upper end ofthe arc and serving'to steady the arc and to keep-down the temperature yof the 'upperUnder these conditions an' u electrode. Ward current of air is alsoproduced from t e bottoni and the si'des` of the globe, which currentcauses thedowerend 'of the are. to..v

, besjurrounded by an upwardly moving shell "The air circulationA thusprovided'serves'to steady thearcas well `as to lcarry'out of thearclamp" strucor tubular mass of air.

ture'any fumes or smoke which'may'resultl from the consumptionof theelectrodes.

Theparticular lamprmechanisrn disclosed is intended for operation in thealternatingcurrent circuit. Underthese circumstances we haveobtainedexcellent results by malring the upper'electrode of the lamp of ordinarycarbon land byforming the.y lower' electrode b principally 'ori entirely'of titanium car- In the modification ofour invention shown` in Fig. 4the member 35' is engaged by an.

'upper clutch member 42 which is connected to the feeding mallet. Thelower clutch member 38 is normally "held in the position in`whilc'hiitis lock-ed to the member 35 by Aa long` helical spring` 60.yThe member .38J is provided'with an aperture 61 through which extends apost' 62 adjustably secured to the laml frame-work.'v Thepost-62 Aisinclinedv to t e line `of movement of the me'mber3`5. Consequently asthe member 35is moved upward by means 'offl the clutch. 42'," it is'ro-y tated by reason of thel engagement. .of the member'l with theaperture 61,'thus moving' the'lowerv lelectrode out of jalinemelrtwith'the upper electrode. -In this construction, as shown, the up er endof' the lmember 6 2 'is provided` with which serves as a stopte limit vthe upward movement of the clutch member 38", vSimi- V .1*10.

'mg the downwardV movement ofthe clutch.

In-this form of. our invention the' larly, washers 64 may ,serve asstops limitan .enlargement 6 3v f length of the arc struck' at eachfeedingy op eration is the lay of the member 38 be- 'tween theenlliirgement `r63 Jandthe top washer 64..-

.. While the'forms of our inventionl herein-'i4 before described havebeen foundfto give excellent results inV ractice it 'will be readilyunderstood byfal those v'skilled in the art that changes may 'be.madeinthe forms of .our invention without de arting. from its sptirit,and we do notwish 'tl e claimshereinl a er madeito be limited to theparticular constructions described and illustrated more than is madenecessary by thestate of the art.

'1.' In an arclamp, an electrode, a stop ad- What we claim as newand'desire tosecure by Letters Patent of the United States, is,+

ljacent the -arcing end of said electrode but out of line therewith, asecond electrode normall-y in line with the first-mentioned electrede,and means for rmoving said second electrode toward the iirst-menti'onedelectrode and also laterally lso as to bring it into engagementwith saidstop and the first-4 mentioned electrode.l

2. In an are lamp,fthe combination of two electrodes normally-in-axialalinement with" e'a'ch other," and `means for moving one of saidelectrodes toward thel other and laterallyv with yrespect to the axisof. the other elecl trodej.-

electrodes normally in axial alinement with veach other, and means formovingY one-of 3. e In an are lamp, the combination of two saidelectrodes"simultaneously toward the other and laterally with respect toits own axis. l v

l 4. In an arc lamp, anelectrode, Va support for the same, vand meansfor moving the support parallelto theaxis ofy the electrode and v aboutanother axis parallel to thatof the 2,5f'electrode.

5. In an 'arc lamp, a movable electrode, a

moving it toward the first-mentioned electrode and .laterally intoengagement with' ysaid stop.

6. In an arc-lamp, an'upperA electrode, a shield or guard surroundingits lower and arcing end and provided with a sto adjacent the arcing end.of said electrode )ut out ofv contact therewithmeans normally7 holdingthe u per electrode in iixed relation tofsaid vshiel a lower electrode,means for moving said lower` electrode toward the upper electrode andlaterally into position to `engage r said ystop and to be engaged'by theupper electrode, and meansfor causing said upper electrode to bereleased at or about the instant at which the lower-electrode engagessaid stop whereby an engagement between the two electrodes occurs whilethe lower electrode is vin engagement with the stop.

7. In an are lamp; an electrode'from which an arc normally axiallyextends, a movable electrode-carrying member, a clutch engaging saidmember'for moving it parallel to the axis of the electrode, and meansfor moving said clutch laterally to thereby turn said member rotativelyabout an axis onset from but parallel to that of the electrode.

8'. In an are lamp, a chimney, a hood car-` ried at the lower end of thechimney, a nozzle carried -by` the hood in line with the axis of thechimney, an electrode projecting through said nozzle and extending intosaid chimney,

a conduit for .conveying air from outside said hood to said nozzle'7 andmeans extending through' saidl conduit" for controlling the movementofthe electrode passing Vthrough said nozzle.

9.. In an arc lampl a chimney, a hood supported at the lower endthereof, an annular member supported bythe hood With'its axis in linewith the axis oi sald chimney, a conduit establishing' communicationbetween the space outside of said hood and the 1nterior of said annularmember, `and a perforated diaphragm located in andinsulated from saidannular member.

Y 10 In anare lamp, -an electrode, a movable electrode-carrying memberwhose axis is parallel to but offset-from that ofthe electrode, a clutch-for moving the memberin a direction, parallel to its length, and means'chambered mem-ber establishing communica-v tien between said pockets,an electrode, one lend of whichextends transversely through .saidchambered member, a clutch member located? in said chambered member, andan operating device therefor extending into one of said pockets.-

12. In an 'arc lamp, a pair of electrodes normally. in axial alinementwithv each other, and means for automatically moving said electrodessimultaneously in the lines of *their axes and one of them laterallythereto.

In witness whereof, we have hereunt-o set our hands this second day ofJanuary, 1906. RICHARD FLEMINWG.'

CROMWELII A. B. HALVORSON, .IIL

lVitncsses:

loi-,1N A. McManus, Jr., HENRYTQ...WESTENDARR

